The eye is like a ball in which a three-layered tissue surrounds the central cavity containing a jelly-like fluid.
The innermost layer is the retina that receives light and sends images of objects to the brain. The middle layer of the eye, located between the sclera and the retina, is called the uvea. The outer layer of the eye, called the sclera, is a tight-fitting white-eye-colored wall. Uveitis is inflammation of the uvea. Uveitis affects one or both eyes and may also affect other parts of the eye, such as the cornea, scrotum, vitreous, retina, and optic nerve. Uveitis is the main cause of 10% of blindness in the world.
Importance of the Uvea
The uvea includes a large part of the blood vessels (the veins, arteries, and capillaries) that is responsible for blood flow inside the eye. Due to the fact that the uvea bleeds important parts of the eye, such as the retina, its inflammation can lead to visual impairment